Indiana News

Pulling Chestnut seedlings to be used for grafting

On March 4, 2022 Caleb Kell, who works on chestnut breeding at Purdue’s Hardwood Tree Improvement and Regeneration Center, pulled and packaged American chestnut seedlings at the Indiana DNR state tree nursery at Vallonia Indiana. These robust seedlings are one year old. Caleb was assisted by chapter volunteer Sharon Kotnik as well as workers from the nursery.

Many of these seedlings will be used as rootstock. The stem will be cut off a short way above the roots and scion wood will be grafted onto the rootstock. Scion wood is a shoot or twig cut from the upper branches of an existing full grown tree, in this case a long term surviving American chestnut tree.

Often grafting is the only way an old chestnut found in the forest can be preserved. Chestnut trees that are still alive after many years of growing in the wild and surviving the blight are a very valuable genetic resource and their genetics or “germplasm” needs to be preserved for breeding ever more blight resistant chestnuts. The grafted trees are grown in our germplasm conservation orchard, GCO. The pollen and nuts from our GCOs are used to breed new backcross chestnuts and also sent to locations where TACF is doing research on producing transgenic chestnut trees using the oxalate oxidase gene.

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Join us on tomorrow, October 10, 2025, from 11:30AM – 1:00PM (EPT), for the next LIVE Chestnut Chat.

Our special guest, Dr. Trevor Walker, Assistant Professor of Forest Genetics and Co-Director of the Cooperative Tree Improvement Program at NC State University, will share insights from 70 years of breeding loblolly pine for disease resistance, growth, and stem form. He will also consider which practices are likely to succeed for American chestnut, which are not, and why.

Visit tacf.org/event/chestnut-chat-breeding-disease-resistance-in-loblolly-pine/ to learn more or register.
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Join us on tomorrow, October 10, 2025, from 11:30AM – 1:00PM (EPT), for the next LIVE Chestnut Chat.Our special guest, Dr. Trevor Walker, Assistant Professor of Forest Genetics and Co-Director of the Cooperative Tree Improvement Program at NC State University, will share insights from 70 years of breeding loblolly pine for disease resistance, growth, and stem form. He will also consider which practices are likely to succeed for American chestnut, which are not, and why.Visit https://tacf.org/event/chestnut-chat-breeding-disease-resistance-in-loblolly-pine/ to learn more or register.

Do you love pulling on your work gloves and cracking open freshly fallen burs to reveal the chestnuts inside? If you do, but don’t have any of your own yet, become a member and get access to our wild-type seed sale in 2026. In just a few years, your hands could be full of spiky burs and American chestnuts of your own. support.tacf.org/membership/new-regular ... See MoreSee Less

35 CommentsComment on Facebook

I use my boots to open them!

Porcupine eggs!!😂🤣

I have a bag full.

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We’re proud to share this segment from the PBS show Human Footprint, featuring former TACF staff member Sara Fitzsimmons. The American chestnut sequence was selected to be adapted into a standalone YouTube video, which launched in late September and has already garnered more than half a million views. Sara’s dedication and expertise have shaped much of the progress in restoring the American chestnut. Give it a watch to learn more about this important work. ... See MoreSee Less

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2 CommentsComment on Facebook

Great presentation!

🌰 Harvest season at TACF’s Meadowview Research Farms brings both beauty and breakthrough science. Many of the chestnut crosses we gather are generated through recurrent genomic selection—cutting-edge research driving restoration forward. Each bur holds not only the wonder of new life, but also the promise of a future where the majestic American chestnut returns to our forests. 🌳

#americanchestnut #castaneadentata #americanchestnutfoundation #ChestnutResearch #meadowviewresearchfarms
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1 CommentComment on Facebook

Are there places we can purchases a Chestnut tree that is disease resistant? Thanks!

We'll be co-hosting American Chestnut Day at the NC Arboretum this Saturday! If you're local, we hope you'll join us for a fun day of speakers, activities, and even a wild-type chestnut seedling sale! ... See MoreSee Less

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